Compilare: user.cpp: In function ‘void read()’: user.cpp:15: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘bool priority3()’: user.cpp:83: warning: array subscript has type ‘char’ user.cpp: In function ‘void print()’: user.cpp:95: warning: array subscript has type ‘char’ user.cpp:95: warning: array subscript has type ‘char’ user.cpp:92: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp: In function ‘int main()’: user.cpp:17: warning: array subscript is below array bounds